Double-acting reciprocating pump



Jan' 13 l953 H. P. MALONEY DOUBLE-ACTING RECIPROCATING .PUMP

a sheets-sheet 1 Fild April 20, 1948 M 8Min Jan. 13, 1953 I H. P. MALONEY 2,625,115

' Douma-ACTING RECIPROCATING PUMP Filed April 2o, 194e s sheets-sheet 2 Harry P. Maloney JNVENToR.

H. P. MALONEY DOUBLE-ACTING RECIPROCATING PUMP Jan. 13, 1953 3 Shee's-Sheet 3 File'd April 20, 1948 INVENTOR.

Harry P. Maloney lll!! b.

Patented Jan. 13, 1953 'UNITED STATES PATENT' -GFFICE DOUBLE-ACTING RECIPROCAT-ING PUMP Harry P. Maloney, Santa Ana, Calif.

Application April 20, 1948*, Serial No. 22,173

My invention relates to improvements in double acting,Y reciprocating pumps for pumping liquids and gases as required in oil wells, refrigeration plants, or for hydraulic pressure purposes.

The primary object of my invention is to provide a pump of the type indicated for suspension in a well, or in a sealed unit of a refrigeration plant, or in a hydraulic lift for a bull-'dezer blade, and in which a single pump plunger and packing are arranged so that friction in the pump is reduced to a minimum, together with wear, and high speed 'operation is rendered practicable With a 10W power driving source, all without sacrificing efficiency as regards output capacity.

ther and ancillary objects, together with the precise nature of my improvements, will become readily apparent when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this Specification,

In 'said drawings:

Figure. 1 is a view in side elevation Vof my im- 'proved pump in a preferred embodiment thereof;

Figure 2 is a view in vertical section taken on the line 2--2 of Figure 1;

Figure 3 is a view in transverse section taken on the line 3--3 of Figure 2;

Figure 4 is a similar view taken on the line ll-s of Figure 2;

Figure 5 is another similar view taken on the line 5--5 of Figure 2;

Figure 6 is still another similar view taken on the line 6 6 of Figure 2;

Figure 7 is a fragmentary view in perspective of one of the packing rings;

Figure 8 is a view in vertical section illustrating a modied embodiment of my improved pump;

Figure 9 is a view in transverse section taken on the line 9-9 of Figure 8;

Figure 10 is a similar View taken on the line lll-I0 of Figure 8;

Figure v11 is -a fragmentary view. in vertical section illustrating another modified embodiment of my improved pump.

Referring to the drawings by numerals, and iirst to Figures l to 7, in the preferred embodiment thereof, my improved pump comprises a pump cylinder l adapted to be disposed in upright position and including a pair of upper and ilower, aligned, half sections 2, 3 with inner ends 2', 3' coupled together as presently described, the upper section 2 being closed atits outer end by a cap-type head 4 threaded thereon, and the lower section 3 having an outer integral head ,5.

A conical, axial, `prnf'ltitioning seat 5 in the outer 2 Claims. (Cl. 10S- 175) end of the upper section I, formed integrally with the head l1i, tapers from the circumferential wall of :said section 2 to said head d. A similar partitioning seat l in the outer end of the lower section 3 integral therewith tapers from the circumferential wall of the section to the end 5 of said section. The seat 6 .partitions the 'outer end of the upper section I and forms therewith around the :same an annular collecting chamber B in the outer end of the upper section 2 and the seat 'l forms in a like manner a similar annular chamber 9 in the outer end of the lower section 3 and both seats 6, l form with the upper and lower- `sections 2, 3 a plunger chamber I@ with conical ends. Circumferentially spaced ports iI in the lseat Ii and similar ports I2 in the seat 'I establish communication between the collecting chambers Il and opposite ends of the plunger chamber II).

A pump plunger I3 with a cylindrical hollow body I4 smaller in diameter than the plunger `chamber I 0, intermediate the ends of said chamber, and having tapered upper and lower ends I5., I6 is provided in said chamber Il! to reciprecate therein with said ends I5, I5 alternately seating in the seats 6, l. A plunger rod i? extends from the upper end of 'the pump plunger I3 out ci the head fl through an axial stuning box IS on said head 4 'and is adapted to be reciprocated by a power drive, not shown. The pump plunger body' I4 reciprocates in an annular packing assembly I9 interposed between the inner ends 2 3 of the upper and lower sections 2, 3 of the casing l, and which spaces said body from said sections a substantial distance and will now be described.

The packing assembly I9 comprises a pair oi upper and lower, annular, packing rings 2t* of leather, or the like, interposed between the inner ends 2', 3' of said 'sections 2, 3 with a flat, metal packing ring 2l interposed between the pair and in which the body Isl of the pump plunger I3 reciprccates with a working t. An internally hanged coupling ring 22 is threaded onto the inner end 3' of the lower section 3 and engages a circumferential flange 24 on the inner end 2 of the upper section 2l), so that said inner ends of said sections 2, 3 are coupled together with the packing assembly I9 clamped therebetween 'to form a tight seal between said ends of said sections. Annular ribs 25 on the packing ring 2| are provided to bite into the pair of packing rings 2li, and annular grooves 26 are formed in the inner ends 2', 3 of said sections 2, 3 to provide for the packing rings 2D being squeezed into said prooves to facilitate forming a tight seal. The

upper and lower packing rings 20 are provided with internal upturned and downturned annular lips 21, 28, respectively, which are nexible so as to each frictionally grip the body I4 of the pump plunger I3 during one stroke of said plunger while the other lip flexes out of frictional gripping relation to said plunger. Air vent ducts 29 are provided in the inner end 3' of the section 3 for the escape of air pressure when the sections 2, 3 are being coupled together and resulting from compression of said rings 20. Annular, internal, grooves, as at 30, may be provided in the sections 2, 3 for the lips 21, 28 to expand into during opposite strokes of the plunger I3 so that during said opposite strokes the lips 21, 28 function alternately to free the body I4 of the plunger I3.

Circumferentially spaced series of guide lugs 3I on the body I4 of the plunger I3, adjacent the ends I5, I6 thereof, space said body from the sections 2, 3 to guide said plunger I3 in a straight line, said lugs working against said sections' upon opposite sides of the packing assembly I9.

A pair of intake nipples 32 extend out of the outer end of the section 3 upon diametrically opposite sides thereof with inwardly opening flap valves 33 therein for controlling communication between the same and the collecting chamber 9. A similar pair of intake nipples 34 extend out of diametrically opposite sides of the section 2 and the upper collecting chamber 8 with inwardly opening flap valves 35 for controlling communication between the same and said chamber 8. Thus, with the pump submerged in the liquid '1n a well, the same may take liquid into both chambers 8, 9.

A pair of output nipples 36 extend out of opposite sides of the section 3 from the lower collecting chamber 9 with outwardly opening flap valves 31 therein controlling output from said lower collecting chamber 9, and a pair of similar output nipples 38 extend out of the head 4 from the upper collecting chamber 8 with outwardly opening nap valves 39 for controlling output from said chamber 8.

An output nipple 40 extends out of the lower seat 1 and the outer end 5 of the lower section 3 in the axis of said section and is connected in a cross output line 4I having outwardly opening discharge nap valves 42 therein upon opposite sides of said nipples 40. The cross output line 4I is connected by elbows 43 to the lower ends of a pair of vertical output lines 44 upon opposite sides of the cylinder I and in which the output nipples 36 are connected by T-ttings 45, said lines 44 having the upper ends thereof connected by T-ttings 48 to the output nipples 38. Suspension, output pipe lines 41 extend from the T-fittings 46 upwardly and are adapted for discharging at the surface of a Well, in addition to functioning as suspension lines for the pump.

Referring now to the operation of the described embodiment of my improved pump, during the upstroke of the pump plunger I3, suction is ef fected in the plunger chamber IB below the packing assembly I9, and consequently in the lower collecting chamber 9, whereby liquid is drawn into the lower collecting chamber 9 through the intake nipples 32 past the flap valves 33 and from said chamber 9, by way of the. ports I2, into the plunger chamber I0 below the packing assembly I9. During the downstroke of said plunger I3, suction is effected in said chamber IIl above the packing assembly I9 and consequently in the upper collecting chamber 8 by way of the PDI'S. 'l

so that liquid is drawn into said chamber 8 and into the plunger chamber IIJ above the packing assembly I9. In the downstroke of said plunger I3 compression takes place in the plunger chamber I0 below said assembly I9 and consequently in the lower collecting chamber 9, whereby liquid is forced out of the output nipples 40, 36 past the valves v42, 31 into the cross output line 4I and the output lines 44. Similarly, in the upstroke of the pump plunger I3, compression takes place in said chamber I0 above the packing assembly i9 and consequently in the upper collecting chamber 8, whereby liquid is forced out of said chamber I0 above said assembly I9 and is also forced out of said chamber 8 past the valves 39 into the suspension output lines 41 to be discharged, together with the liquid from the output lines 44, at the surface of the well.

The upper and lower-collecting chambers 8, 9 trap sediment and prevent the same from entering the plunger chamber IU. Also, as the plunger I3 approaches its limits of movement compression in said chambers 8, 9 is accelerated so that high turbulence is created in said chambers facilitating complete evacuation therefrom of sediment collected therein. As will now be apparent, friction in the described pump is reduced to a negligible factor, comparatively speaking, because of the clearance 68 provided between the pump plunger body I4 and the wall of the plunger chamber I8 and so that the pump is adapted to withstand long use, and is susceptible of comparatively high speed operation by a low power motor drive or the like.

In the modified embodiment of my invention shown in Figures 8 to 10, the pump plunger 48 is provided with flat ends 49 and the collecting chambers and the seats of the preferred embodiment of lthe invention are dispensed with. However, the pump plunger 48 Works in a packing assembly 58 identical with the packing assembly I9, is spaced from the pump cylinder 5I by said assembly 50 and by end series of radial lugs 52 working against the wall of Said cylinder, all in the manner and for the same purpose as in the preferred embodiment of the invention. Intake nipples 53 with inwardly opening flap valves 54 are provided in the outer end of the lower section 55 of the pump cylinder 5I, and similar inlet nipples 51 with inwardly opening ap valves 56 are provided in the outer end of the upper section 58 of said cylinder. Also, an output nipple 59 is provided in the outer end of the lower section 55 and a pair of output nipples 60 in the outer end of the upper section 58 with outwardly opening flap valves 6I, so that in this embodiment of the invention, the pump is also double acting. The output nipple 59 is connected to a cross output line 62 which is connected by output lines 63 to the output nipples 60 and to suspension pipe lines 63 all as described with reference to the preferred embodiment of the invention. As will be seen, in this embodiment of my invention, combined suction and compression chambers are provided in the cylinder 5I above and below the packing ring assembly 50.

In the embodiment of the invention shown in Figure 11, spaced apart, metal, packing rings 64 are mortised into the pump cylinder for all metal contact withthepump plunger 66 which is spaced from said cylinder 65 for the same purpose as in the other described embodiments of my invention. y

` The foregoing will, it is believed, sumce to im#- part a clear understanding of my invention, without further explanation.

Manifestly, the invention, as described, is susceptible of modification, without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

Having described my invention, what claimed as new is:

1. In a pump of the class described, a pump cylinder adapted to be disposed upright and including a pair of aligned upper and lower half sections having confronting inner ends, a packing ring assembly interposed between said ends of the sections and forming therewith a plunger chamber, means coupling the inner ends of said sections together and clamping said assembly between said ends, a pump plunger in said chamber of smaller diameter than the same spaced from the wall of the chamber by said assembly, a plunger rod extending from one end of said plunger out of the outer end of one section for reciprocating said plunger, and means to introduce liquid into the outer ends of said sections and discharge the same therefrom under suction and compression in said ends respectively, said assembly including a pair of packing rings with upturned and downturned flexible lips projecting into the chamber and extending axially along the plunger in the space between the plunger and the inner wall of the chamber and each frictionally gripping said plunger during movement of the plunger in one direction while the other exes out of friction gripping engagement with said plunger, and circumferentially spaced guide lugs on said plunger adjacent opposite ends thereof slidably engaging said wall and preventing side play of said ends when said ends are remote from said assembly.

2. In a plunger-type pump, a pump cylinder L adapted to be disposed upright and having end heads, a pair of conical circumferentially ported hollow partitions in opposite ends of said cylinder coaxial therewith and tapering from the inner wall of the cylinder to said heads with said ends of the cylinder circumposing said partitions, said partitions forming internally conical plunger seats in the ends of the cylinder and together with said cylinder and heads forming annular sediment trapping chambers in the ends of the cylinder communicating with said cylinder through said ports, a reciprocating plunger in said cylinder having conical ends for fitting in said seats and movement into and out of said seats alternately by reciprocatlon of the plunger, a packing ring assembly in the transverse center of said cylinder in which said plunger reciprocates between said partitions and whereby each conical end effects through said ports compression and suction in one 'of the chambers alternately as said end moves into and out of said chamber, means to introduce liquid into said chambers under suction effected in the chambers, and means to discharge liquid from said chambers under compression eiected in the chambers.

yHARRY P. MALONEY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS p Number Name Date 99,403 Cardwell Feb. l, 1870 456,643 Watt July 28, 1891 528,282 Worthington Oct. 30, 1894 1,027,841 Hildebrand May 28, 1912 1,380,363 Decrow June 7, 1921 FOREIGN PATENTS Number Country Date 3,256 Great Britain July 26, 1881 

